Combined door lock and latch



F. MEYER.

COMBINED DOOR LOCK AND LATCH.

APPLICATION FILED MAY I5. 1920- 1,415,104.. I Patented May 9,1922.

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FEEDER/TCE MEYER, OIF BUFFALO, NW YORK.

oor/reinen noosJ Look .ann LATCH...

' i Application fnac. Mayta To all whom t may concern Be it known thatl, FREDERICK MEYER, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have inventedy newand useful Tinprovements in Combined Door Locks and Latches, of whichthe following is a specilication. Y

This invention relates to a'combined lock and latch for swinging doorsand more particularly for the doors used in railway refri erator cars.

ne of the objects of the invention is to pro-vide a combined lockandvlatch by means of which the door to which it is attached may behermetically closed so as to prevent all leakage of air through thejoints around the door. A further object of the invention is to providea strong and durable locking latch which may be unlatched from eitherthe outside or the inside of the door, so that a person cannot beimprisonedV by an accidental v latching of the door. A still furtherobject of the invention is to provide a locking latch which'niay beeasily applied to a door either where said door has already been in useor where the sainer is new and unused. Further objects and advantageswill appear more clearly from the following description and accompanyingdrawings wherein:

Figure l is a horizontal longitudinal section of apart of a door andwall showing the locking-latch applied thereto in plan view and in itslocked position. .Figure 2 is a horizontal longitudinal section throughthe locking latch withthe same in its latched but unlocked position.Figure 8 is also a similar horizontal longitudinal section but in boththe unlatched and unlocked position. Similar characters of referencereferto like parts throughout the several views.

This improved locking latch may be applied toany swinging door but it ismore particularly adapted for use with the door of a railwayrefrigerator Garland will be hereafter so described and treated thoughof course the same may be otherwise utilized. The vertical outer wall 10of the refrigerator' carv is provided with the usual doorwayv 11 andwith the swinging or hinged door l2 which. is adapted to engage theadjacent j ambportion of the wall or door frame and is suitablymountedon hinges (not shown) or is otherwise pivoted at one end (the left handend as it is vshown in the accompanying drawings) so as to be able toswing out- Specirication of Letters Patent.

rammed May e, 1922. 1920.V sei-iai No. 581,623.

wardly in an are in the direct by the arrow shown in Fig'. 3.

its inward swinging movement is, of course, limited by striking againstthe outside face of the wall. For refrigerator work or for otherpurposes where it is highly desirableto hermetically close the door, andthis desired result is most easily secured by merely causing the door tobe jammed or closed tightly under the influence of a veryk heavypressure. Such a heavy jammin pressure on the closed door isaccomplished as follows:

Arranged on the wall adjacent to the edge of the door opening is a base14, which is provided at its front edge with an outwardly projectingstandard 13 and with apair of lateral 'base Hanges or ears 15, whichears are secured to the wall by means of screws 16 and 160. Pivoted byVa pin 17 t0 the outer end of the said standard 13 is a pressure barorwedging lever 18 whose inner thickened end is bifurcated at 2O andembraces opposite sides of lSaid standard 1S in a very substantialandstrong manner. VcSecured by screws 21 or otherwise to the door andadjacent to the' said standard 13, is a long heavy thrust plate 22 whichis preferably Vprovided onv its inner end with a pair. of thrust faces23 which are preferably inclined as shown. The wedging lever 18 `isprovided adjacent to its pivot 17, with a pair-of cam faces 24, whichare adapted to come into contact with said thrust faces 28 as tl e leveris turned into the position shown in 1. This action ofthe cam faces 2eof the wedging lever causes the doorto be closed or pressed backwardlyvery forcibly against the wall, thereby assuring a tight, hermetic jointbetween said door and the wall. .The frictional resistance between thesaid cam faces 2li and the thrust faces aids in preventing anyalteration in the respective positions of the parts.v The outer orthin-end f the wedging lever 1S is provided with a longitudinal slot 26vwhich extends through the lever from one face thereof to the other andis adapted to receive very loosely within its interior, a staple eye orlocking post 27 whose legs are suitablysecured to the outer end ofthethrust plate 22. To lock the refrigerator door when said wedginglever has been closed, a padlock 28 is passed through the outer end ofthe said staple eye on the outside ofthe said kwedging lever 18. Thesame result may be obtained however, by any7 other suitable means as forinstance passing` ion indicated f a strip of metal through the saidstaple eye and securing its ends by means o t' aV compressed lead buttonasis common practice Vin railway work. It should be noted that the dooris not necessarily held Vor retained'in its tight position by either thepadlock 28 or by 'theffrlctionalresistance 0,1. the cam faces 24;

against they thrust facesv 23. rlylie wedging lever principally retainsits position oi? its Sover 1;1avelv past, the dead, Center pesi tion'.That is, whemthbe outerthin endl ot the wedginglever 18 strikes theouterface oi the thrust platei'22, a linewhic'h is perpen-v the geometricrelationship ot Fig. 1) that the lever will be held iirmly in placemerelyby reason ot the i'irictional resistance ot'the abutting aces otthe parts. 'It is obvious too that the closed door is onlysubject tovibration whefnthe'car is actually in' motion and A,it

only underl such conditions; lthat the" accivdental. openingfo't theydoor by vreason of vibration needfbe considered, 'lt is'readil'yundersOdtliat Vwhen thecar is actually in'ni'otion the 'door is4positively preventedtroin n accidentally opening by reason otthepadloclr 28 aforesaid,A because the purpose eta' car loclrf is tokeep the same locked while in transit.

The invention also provides :for the latching ofthe door which ot courseis aV very use ful adjunct oil? refrigerator doors inasmuch as suchdoors must be kept closed atall times except only when' actually beingloaded ory unloaded. The latching 4 arrangement sho wn inthe drawings isas Yfollows:

i ltzrtending inwardly 'from the inner side oit the iront part ot thestandard l"i'lis a pair ot'pivot ears 3() which receive opposite ends ofa vcatch pivot pin 31. livoted at` its lower end on said catch pivotpin' is a catch 32 Yliich`- is suitably received within the hollow lowerinterior 'of said standard, The `upper 'forward part ot the catch isprovided with a latching tongue or engaging )ron whose uaoer edge yisAta aered or t beveled inwardly and 'forwardly and whose lower vedgeprojects straight out laterally. The rearend o'tvthe catch narrows downto torni along curvedtail piece 34; which eX- tendsrearwardly andsomewhat upwardly and whoseouter tipis adapted to be pressed inwardly bythe wedgingvlever 18' in such manner as to unlatch the catch when saidwedging` leverisl turned b'aclrtrom the positionshown in Fig. 1 to thatshown in Fig.

3. Thalatching tongue 33er" Vthe catch possibly move; or

is adapted to co-operate with an abutment 35 which is .combined in Voneintegral piece or' metal with theV :riore-described thrust plate 227 theaforementioned thrust faces 23 being ,formed-Ton epposite longtiudinaledges of said abutment 35. The outer face of said.- abutment islongitudinally straightrand' VJdat and isA adapted to hook under orengage with the'iatuiider tace oty the aforesaid llatching tongue 33 asshownin Fig. 2. The

inner or rear cornerl ofthe abutment etais however rou'ndetcl` orbeveled somewhat so that, as, the door is closed and theabutment.

bonies in Contact with the,.beveled upper corner of` theflatchingtongueY33, said abutinent lcauses the catch'to 'be Iuilatchedory thrown rearwardly into the position shown in Fig. 3 ,in a mannercommon toordinary latches. Thevlatehing: of theV catch is theretoreautomatic in` its action, whereas? the u'nlatching thereojl" isaccomplished bymanu ally moving lthe wedging lever 18 rearwardly v. .y Yi rllolthe rear part ot the catch is pivoted a curved draw l'inlrwhoseouter end 1s b1 Athroated and whose inner curved end extends inivardlyandis guided in the standard ina.`

s iiitable recessed bleariijigv lO. The counter sink or annular recessil on the/outer side rot vsaid bearing 40 is arranged to receive Vthelower `Lend ot a compression catch lspring 42 which jencircles thecurved y draw, linlr? and bears with itsV opposite ends againstthe'upper bifurcated end of, said draw4 linlri andV against theV bottom olthe aforesaid y recess troni the position ot' Fig. 2 lto tlrantof'Figfpv llir'espectively. `VThuspthe spring tendsto alnijays move'thecatch torwardl'yi-rito the` Vlatcliingpositionshown 1n F ig. 2. j v

To prevent a workman 'from becoming accidentally imprisoned 'or2 latchedinytheretrigerator car,"a fsai'ety or emergency device is'iprovidedwherebyffthe catch 32 may bev inflatchetlrroin the .inside oifth'e carlThis safety-device consists a cliain Zlfonotherl' l flexible.einergen'cy-` connection, whichv is fastened at its outer lend Vto 'theatoresafiddraw linkI 37 and isffastened at its inner end Ito a`sealingdisk -orfwasher Zllwhich is preterably provided with a ringfloifotliersuitable means for manually seizing the ,saiddislg. Theflexible einer@ ncycOnnection or chain 48 isot lsuch chai @ter astobefreadf,

ily` alteredfin length to .suit the y*partic'ular' thickness ithekwallof lthe refrigerator car in: which the combined lock and latch iemployed astoftheilexible connectionfl the. required number 4ot luilrsare .in ere and the outermost linlr'snitable bentfon or fastenedtolr'thelouter side the' disk o 41e, while the sa id flexible connectionwhich' is 1 Y being `employedis conVst-,rucfted'of` any other br/insinstalled. ln the caseY where a chain isbeing ias tleribleyrnaterial, islikewise inerelyfcut to proper y length andV suitably fastened' to thefY outer "taceV of fsaid disli. The lsaid'ernergency connection 43 orchain passes through the refrigerator Wall and through thevbore of ametal tube which is cut to the desired length and swedged or driven intoplace, so that the chain is enabled to pass through the refrigeratorWall freely and Without friction and Without liability of becomingtangled up Furthermore as the Walls of refrigerator cars are frequentlyfilled with loose insulating material such as saw dust the use of thischain tube 39 p events the said insulating material from leaking out ofthe hollow part of the Wall and clogging up the said chain i3 and itsappurtenances. The sealing disk le serves to hermetieally seal the chaintube 39 When the catch is in its outer or normal, latched position sothat any flow of air and, therefore any consequent transfer of heat by aleakage is prevented eX- cept only when the catch 32 is momentarilyunlatched or thrown back Whenever' it is desired to unlatch the door.

In other Words, the normal position of the catch and its emergency chainare, shown in Figs. l and 2, and in this position the chain or'thesealing disk is of course prevented from becoming accidentally retainedin its drawn out position. Ordinarily, hovvever, in practice themovement of the draw link SZ'is taken up by the contraction of the linksof the chain or by the contraction of any other flexible connectionWhich may be employed, Without disturbing in anyv Way the sealing disk44C lor the ring which is attached to the inner side thereof.

lt Will thus be seenthat the invention not only permits of tightlyjamming the door closed and locking the same in this tightly closedposition but also servesl as an easily operable latch for temporarilylatching the door in its closed'position. The imprisoning of a Workmanin the refrigerator car by reason of the accidental lat-ching of thedoor while he is inside the car, is entirely prevented by the safety oremergency device Which is operated by the ring d5. The Ymetal chain tube39 enables this emergency device to be employed in a refrigerator wallof any thickness and of any sort of internal structure. The nature ofthe chain or flexible connection i3 is such that it Would not ordinarilydisturb the position of the sealing disk le and certainly very slightly,if at all, so that there isno danger of derangement and furthermore thelength of the emergency connection is readily adjusted in lengthso thatthe same may be applied to av refrigerator wall of thickness. lt shouldbe noticed too that the Whole invention is lacking in delicate fragileparts and is thereby rendered suitablo for the heavy duties which arenecessarily imposed upon it in refrigerator car Work. Furthermore theunlatching and the jamming tight of thedoor involve the action of astraight line force, so that the human hand is not necesand reliable inits operation and can he produced at a lovfmanufacturing cost.

l claim as my invention l. A combined door lock and latch com# prising acatch, a vfedging lever provided with a cam face which is adapted, inone position, to tightly jamb the door closed and in another position tooperate the said catch.

2. A combined door lockand latch com prising a catch, a thrust platesecured to the door, a vvedging lever provided with a cam face Which isadapted to be tightly jammed against said thrust plate, said lever beingalso adapted to unlatch the aforesaid catch.

3. A combined door lock and latch comprising a wedging lever providedwith a cam face, .a catch provided with a latching tongue and adapted tobe unlatched by said Wedging lever, a thrust plate adapted to receivethe thrust of the cam face of said Wedging lever, and an abutmentadapted to engage With the latching tongue of said catch so as to latchthe door.

4. A combined door lock and latch comprising a thrust plate and adete'nt plate adapted to be secured to a door, a standard adapted to besecured to a Wall, a Wedging lever pivoted to said standard and providedWith a cam face Which is adapted to be tightly jammed against saidthrust plate7 and a catch also pivoted to' said standard and adapted tobe actuated by said Wedging lever and provided With a latching tongueWhich is adapted to engage With the aforesaid abutment.

5. A. combined door lock ,and latch comprising an abutment and a thrustplatel adapted to be secured to a door, a standard adapted to be securedto a Wall, a catch pivoted to said standard and provided with a drawlink, an emergency connection secured at one end to said draw link andpassing through the Wall to the inside thereof, and a Wedging lever alsopivoted to said standard and provided With a cam face which is adaptedto be jammed forcibly against said thrust plate.

6. A combined door lock and latch vcoinprising a thrust plate and anabutment coinbined in one integral piece and adapted to be securedto adoor, a standard adapted toV be secured to a Wall, a catch pivoted tosaid standard and provided with a latching .,ongue, and a Wedging leveralso pivoted to said standard and adapted in one of its positions, tojam very heavily against said thrust plate and adapted, in its otherposition to operate said catch.

be secured to a wall. a Cach 'voted to said standard and p'ovided withlatchng tongue, a; Wedgnghlevey provided 'with a- 'cam face amd havmgtwo poeltons, m one of" heavily against ehe thrust plaie and in theother pesltlomsmd wedgmg ever 1s adapted to unasch the-'aforesaid catch,and mean;V

for making said lever in its jamming posl.- tion.

FREDEMCK /IEYER.

'hch the cam face is adapted to jam very

